Questions
Two point charges +8q and -2q are located at x = 0 and x = L respectively. The location of a point on the x-axis at which the net electric field due to these two point charges is zero is
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Correct option is C
The net field will be zero at a point outside the charges and near the charge which is smaller in magnitude.Suppose E.F. is zero at P as shown. Hence at P; k⋅8q(L+l)2=k⋅(2q)l2⇒I=LSo distance of P from origin is L + L = 2L.Similar Questions
Four point +ve charges of same magnitude (Q) are placed at four corners of a rigid square frame as shown in figure. The plane of the frame is perpendicular to z - axis. If a –ve point charge is placed at a distance z away from the above frame (z<<L) then
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